Cholera, an acute diarrheal illness caused by the bacterium Vibrio cholerae, is a significant health concern in Nigeria. It is often linked to poor water and sanitation infrastructure, leading to outbreaks in affected communities.

Gastroenteritis, commonly caused by viral or bacterial infections, leads to inflammation of the stomach and intestines, resulting in symptoms such as diarrhea, vomiting, and abdominal cramps. Improved hygiene and sanitation are key to preventing the spread of these conditions.

Nigeria is located in the "meningitis belt" of Africa, where outbreaks of bacterial meningitis are common, especially during the dry season. Meningitis causes inflammation of the membranes covering the brain and spinal cord and can be lifethreatening if not treated promptly.

Tuberculosis, a contagious bacterial infection that primarily affects the lungs, remains a significant public health issue in Nigeria, particularly in rural areas. Effective treatment and prevention strategies are crucial in addressing this condition.

Pneumonia, bronchitis, and other respiratory infections are common in Nigeria, often affecting children. These conditions can be caused by bacteria, viruses, or environmental factors such as air pollution.

Lassa fever, an acute viral hemorrhagic illness, is endemic in Nigeria. It is transmitted to humans through contact with food or household items contaminated by rodent urine or feces, and can lead to severe complications if not properly managed.

Hypertension, or high blood pressure, is an increasingly prevalent issue in Nigeria, often linked to lifestyle factors such as poor diet, lack of exercise, and stress. It is a major risk factor for stroke, heart disease, and kidney failure.

Type 2 diabetes is becoming more common in Nigeria, especially in urban areas. This condition is often associated with lifestyle factors like poor diet, obesity, and sedentary behavior, and can lead to various complications if not properly managed.

Chronic hepatitis B and C infections are significant causes of liver disease in Nigeria. These viral infections can lead to liver cirrhosis and liver cancer if not properly diagnosed and treated.

Nigeria has one of the highest rates of sickle cell disease in the world. This genetic condition causes red blood cells to become misshapen and break down, leading to various complications like anemia, pain, and organ damage.

Onchocerciasis, also known as river blindness, is a parasitic disease caused by the filarial worm Onchocerca volvulus and spread by blackfly bites. It is prevalent in rural communities near rivers and can cause severe itching, skin changes, and eventually blindness.

Though less common than in the past, leprosy remains a public health concern in certain areas of Nigeria. This chronic infectious disease caused by Mycobacterium leprae affects the skin, nerves, and mucous membranes.